风电齿轮箱行星轮系柔性销轴的强度与疲劳寿命分析

Strength and Fatigue Life Analysis of the Flexible Pin of Planetary Gear Train in Megawatt Wind Turbine Gearbox

以某型号风电齿轮箱行星传动系统的柔性销轴为研究对象,简要分析了柔性销轴在多行星轮传动系统中的均载原理,利用有限元方法对柔性销轴进行了静强度校核与变形情况计算,并利用疲劳计算软件MSC.fatigue对销轴作了基于有限元分析结果的疲劳寿命计算,重点说明了疲劳载荷谱的确定,材料疲劳寿命曲线的定义。结果表明,柔性销轴的强度满足要求,但有必要在销轴轴肩处进行结构改进,降低应力集中,以满足耐久性要求。

Taking the flexible pin of planetary gear train in a megawatt wind turbine gearbox as study object, the principle of load equilibration of flexible pin in the muti--planetry gear transmission is analyzed. By using FEA method, the calculation of deformation and the strength checking of flexible pin and sleeve are carried out. Based on the FEA results, using the fatigue life estimation software MSC. fatigue, the fatigue life of the flexible pin and sleeve is estimated and the process of time history loading setup and material S--N curves definition are explained. All the results show that the flexible pin and the sleeve will be safe in the aspects of strength, but in order to meet the durability requirement, it is essential to make some improvements on the shoulder of fexible pin to reduce the stress concentration.